138408832 has 32 divisors (see below), whose sum is σ = 291960720. Its totient is φ = 65132544.

The previous prime is 138408821. The next prime is 138408847. The reversal of 138408832 is 238804831.

138408832 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 138408791 and 138408800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29628 + ... + 33979.

Almost surely, 2^138408832 is an apocalyptic number.

It is an amenable number.

138408832 is an abundant number, since it is smaller than the sum of its proper divisors (153551888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138408832 is an equidigital number, since it uses as much as digits as its factorization.

138408832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63638 (or 63626 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 138408832 is about 11764.7283011551. The cubic root of 138408832 is about 517.2747362216.

The spelling of 138408832 in words is "one hundred thirty-eight million, four hundred eight thousand, eight hundred thirty-two".